Bounds on the absorptive parts of the chromomagnetic and chromoelectric dipole moments of the top quark from LHC data
Facultad de Ciencias Físico-Matemáticas, Benemérita Universidad Autónoma de Puebla, C.P. 72570, Puebla, PUE, Mexico
2 Ingeniería en Mecatrónica, Universidad Politécnica de Puebla, Tercer Carril del Ejido Serrano s/n, San Mateo Cuanalá, Juan C. Bonilla, Puebla, PUE, Mexico
Accepted: 26 July 2022
Published online: 15 August 2022
Bounds on the absorptive (imaginary) parts of the top quark chromomagnetic and chromoelectric dipole moments are obtained by reinterpreting the most recent LHC data in top quark pair production. It is found that both limits are of the order of , which are consistent with the standard model prediction of . The effects of the absorptive parts of the top quark dipole moments are also studied via some kinematic distributions of production, though no significant deviation from the standard model leading-order contribution is observed. Our bounds can be useful to constrain the parameter space of standard model extensions.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2022. Springer Nature or its licensor holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.